Investigated was the ability of children at different grade levels to develop and form an abstract science concept which required the recognition of a continuum. Direction in forming the continuum was given by having children order a number of pictures to form the continuum which represented the cycle. The ability to form such a concept was associated highly with the amount of direction given the child and to a lesser degree with age. Correlations between age, intelligence, and the ability to form the concept were low. (GR)